C61000 Aluminum Bronze sheet/plate/strip
C61000 is a high-performance aluminum bronze alloy primarily composed of copper (90.0–93.0%) and aluminum (6.0–8.5%), with trace amounts of iron, zinc, silicon, and lead
. It is renowned for its exceptional mechanical properties, including high tensile strength (up to 700 MPa after heat treatment), yield strength, and hardness (e.g., Brinell hardness of 150–200 HB) . The alloy exhibits excellent corrosion resistance in atmospheric, freshwater, seawater, and mildly acidic environments (e.g., sulfuric acid) but is unsuitable for nitric acid applications . Its electrical conductivity (17% IACS) and thermal conductivity make it suitable for electrical components, while its non-magnetic nature and 18K gold-like appearance enhance its utility in decorative and marine applications .
Parameter
Chemical Composition
Mechanical Properties

C61000 Copper Sheet and Strip Dimensions
Note: Dimensions vary slightly based on manufacturing standards

Product TypeThickness RangeWidth RangeLength/Coil SpecificationsProcessing Methods
Copper Sheet1.0–100 mm (cold-rolled)
6.0–300 mm (hot-rolled)
350–1,500 mm (cold-rolled)
10–2,000 mm (hot-rolled)
Up to 6,000 mm (custom lengths available)Cold/hot rolling, forging, annealing
Copper Strip0.03–6.00 mm10–1,220 mmCoil weights: 300–1,500 kg
Traverse-wound or pancake-style coils
Precision cold rolling, slit edges, stress-relieved treatments

Hardness Grades


  • Sheet/Strip: Available in multiple tempers (e.g., soft annealed O60, half-hard H02, hard H04, ultra-hard H06) to suit mechanical and forming requirements .

International Standards
C61000 copper sheet and strip comply with the following standards, which define chemical composition, mechanical properties, tolerances, and testing protocols:

  1. ASTM B169M-2005: Specifies requirements for aluminum bronze plate, sheet, and strip, including C61000 grades .
  2. GB/T 2059-2017 (China): Covers wrought copper alloy strips, with C61000 classified under "QAl7" for half-hard (H02) and hard (H04) tempers .
  3. JIS H 3100-2018 (Japan): Includes standards for copper alloy sheets/strips, aligning with C61000’s mechanical and dimensional tolerances .
  4. EN 1654:1998 (Europe): Addresses strip materials for springs and connectors, applicable to C61000’s cold-worked properties .
  5. ASTM B248: General requirements for wrought copper alloy plate, sheet, and strip, including dimensional tolerances and edge finishes .

Critical Tolerances (Per Standards)

  • Thickness: ±0.02–0.5 mm (varies with thickness range and temper) .
  • Width: ±0.1–3.0 mm (slit, sheared, or sawed edges) .
  • Straightness: ≤1.0 mm/m for precision strips .

Surface and Edge Finishes

  • Surface: Smooth, clean, free of cracks or inclusions; optional pre-tinned or electroplated coatings for corrosion resistance .
  • Edges: Slit, sheared, rounded, or full-rounded, depending on application needs .

Performance Highlights

  • Cold Workability: Superior formability for stamping, bending, and deep drawing .
  • Weldability: Compatible with electric and gas welding but challenging for brazing .
  • Thermal Stability: Low thermal expansion coefficient (18 μm/m·K) ensures dimensional stability under thermal stress .

Chemical Composition

C61000 is an aluminum bronze alloy primarily composed of copper (Cu) and aluminum (Al), with trace elements controlled within strict limits. The chemical composition according to ASTM B169M-2005 is as follows:

ElementComposition Range (wt%)Notes
Cu + Ag90.0–93.0Includes silver (Ag) as a minor element
Al6.0–8.5Primary alloying element
Fe≤0.50Improves strength and wear resistance
Pb≤0.02Minimized for enhanced corrosion resistance
Zn≤0.20Trace impurity
Si≤0.10Enhances fluidity in casting
Other impurities≤0.50 (total)Includes elements like Ni, Mg, etc.


Key Notes:


  • The Cu+Ag content ensures high electrical and thermal conductivity.
  • Aluminum (6–8.5%) provides oxidation resistance and strengthens the alloy.

Mechanical Properties

C61000 exhibits a balanced combination of strength, ductility, and corrosion resistance. Below are its key mechanical properties:

A. Room-Temperature Mechanical Properties
PropertyValue/RangeSource/Notes
Tensile Strength (UTS)350–450 MPaVaries with processing (e.g., cold-worked vs. annealed)
Yield Strength (YS)240–300 MPaTypical for annealed condition
Elongation (% in 50 mm)10–25%Higher ductility in annealed states
Hardness80–120 HBBrinell hardness
Modulus of Elasticity17,000 ksi (117 GPa)Comparable to other bronzes
Fatigue StrengthExcellentSuitable for high-stress cyclic loads
B. High-Temperature Performance
  • Retains >80% of UTS at elevated temperatures (up to 400°C).
  • Stable oxidation resistance up to 600°C due to Al-rich oxide layer.
C. Physical Properties
PropertyValueNotes
Density7.78–8.17 g/cm³Lower than pure copper
Thermal Conductivity40.0 Btu·ft/(hr·ft²·°F)~69.3 W/m·K
Electrical Conductivity15–17% IACSLower than pure copper due to alloying
Thermal Expansion17.8–18.0 μm/m·K (20–100°C)Matches steel for joint applications
D. Corrosion Resistance
  • Excellent resistance to sulfuric acid, seawater, and sulfide environments.
  • Poor performance in nitric acid due to Al reactivity.
INTRODUCTION

Production process and product advantages of C61000 copper plate and copper strip:


1. Production process


Melting and casting process


Use submerged flow transfer technology to eliminate traditional flow troughs, reduce metal liquid cooling and smoke emissions, and improve energy efficiency.


Horizontal continuous casting or vertical continuous casting technology is used for ingot forming, which increases the yield rate by more than 5% and reduces energy consumption at the same time.


Hot rolling and cold rolling


The hot rolling process uses large ingot rolling technology and thickness closed-loop control to increase coil weight, increase rolling speed, and reduce unit energy consumption.


The cold rolling link uses AGC closed-loop thickness control and roller type optimization technology to improve material accuracy and yield rate.


Some companies combine continuous extrusion cold rolling technology with the advantages of energy saving, high efficiency, and high material utilization, which is especially suitable for medium and thick plate production.


Annealing and finishing


High hydrogen atmosphere expansion annealing technology reduces oxidation and improves material surface quality and mechanical properties.


The finishing process further optimizes the finished product size and surface quality through mechanized packaging machine trains and strip slitting technology.


Process innovation


Some enterprises adopt short-process technology (submerged continuous casting-high-precision cold rolling-high-end finishing) to reduce energy consumption and pollution, and increase the comprehensive yield rate by 10%.

Introduce digital management technology to realize dynamic production planning and process coordination to ensure product consistency and stability.

2. Product advantages

Excellent mechanical properties


It has high tensile strength (≥550 MPa) and yield strength (≥200 MPa), while maintaining good ductility (elongation ≥30%).

It has outstanding elastic properties and is suitable for manufacturing parts with high strength requirements such as bolts and shafts.

Corrosion resistance


It has good corrosion resistance in the atmosphere, fresh water, sea water and sulfuric acid environment, but nitric acid environment should be avoided.

Processing adaptability


It has excellent cold processing performance and is suitable for stamping, stretching, bending and other processes, but the welding performance is general.

It has high surface finish and precise tolerance control to meet the needs of high-precision electronic components and automotive parts.

Wide range of applications


Mainly used in wear-resistant parts (such as pump components, connecting rods), bimetallic surface layers, and high value-added fields such as automotive electronics and 5G communications.

Some companies have expanded their products to high-end markets such as CPU slots and semiconductor components through high-precision processing technology.

Industry competitiveness


Domestic companies have improved their product quality through technological upgrades (such as environmentally friendly tin plating technology and lead-free copper development), and gradually replaced imported high-end copper plates and strips.

FAQ

Q1:Do you provide samples? Is it free or extra?
A1:Yes, we can provide samples free of charge and the customer will pay the freight.
Q2:What if I don't have export experience ?
A2:We have reliable forwarder agent which can ship items to you by sea/air/Express to your doorstep. Any way, we will help you choose the most suitable shipping service.
Q3:How long is your lead time?
A3:If it is in stock, it is usually 5-10 days. Or, if there is no inventory, 15 days, depending on the quantity.
Q4:What are your terms of payment?
A4:30% T/T deposit in advance, 70% T/T balance within 5 days after B/L copy, 100%.Irrevocable L/C at sight, 100% Irrevocable L/C after receive B/L 30-120 days, O/A.
Q5:How is your technical support?
A5:We provide lifetime online support through Whatsapp/ Skype/ Wechat/ Email. Any problem after delivery, we will offer you call anytime.

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